Construct a 60° angle, with compass and straightedge

(For assistance see www.mathopenref.com/constangle60.html)

1. | Construct a 60° angle with its vertex at the point P |

2. |
Perform the construction twice to create a 120° angle from two 60° angles that are adjacent (share a side) as in the example: |

(C) Copyright John Page 2017